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All Journal International Journal of Teaching and Learning (INJOTEL) INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE (INJOLE)
Hery Saputra
Universitas Jabal Ghafur, Indonesia
Education Mathematics Other

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ETHNOMATHEMATICAL PRACTICES AND THEIR INFLUENCE ON ELEMENTARY LEARNERS’ NUMERICAL LITERACY: A QUASI-EXPERIMENTAL STUDY Sinta Verawati Dewi; Hery Saputra; Nurina Happy
International Journal of Teaching and Learning Vol. 2 No. 12 (2025)
Publisher : Adisam Publisher

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Abstract

This quasi-experimental study investigates the impact of ethnomathematical practices integrated into the Realistic Mathematics Education (RME) model on the numerical literacy of elementary students in Tasikmalaya, Indonesia. The research addresses the persistent issue of low numeracy skills among Indonesian students, as evidenced by national assessments and international benchmarks such as PISA. A total of 59 fifth-grade students were selected through cluster random sampling from SD Negeri Kasturi and divided into control and experimental groups. The experimental group received instruction using an RME model enriched with local cultural contexts, while the control group followed conventional methods. Data collection instruments included validated questionnaires and observation sheets, with analysis conducted through normality and homogeneity testing, followed by independent t-tests. Results indicated a statistically significant difference in post-test scores, with the experimental group outperforming the control group (t = 2.931 > tₜ = 2.771). Observational data further revealed increased student engagement and participation in culturally contextualized learning activities. The findings suggest that integrating ethnomathematics into instruction enhances students' numerical literacy by providing relevant, engaging, and meaningful learning experiences. This study contributes to the discourse on culturally responsive pedagogy and offers practical implications for curriculum development in diverse educational settings.
APPLICATION OF THE GOAL PROGRAMMING METHOD AND SENSITIVITY ANALYSIS IN OPTIMIZING BREAD PRODUCTION PLANNING Zuhri Zuhri; Sri Rafiqoh; Hery Saputra
INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Vol. 1 No. 8 (2024): INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE (INJOLE)
Publisher : Adisam Publisher

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Umama Bakery's bread production process is considered less than optimal because the production quantity for each flavor variant is unlimited, resulting in insufficient raw materials at certain times. In addition, the order production process requires a long total completion time (makespan), resulting in delays in production completion (mean tardines). The aim of this research is to optimize total completion time, average delay time, use of raw materials used and optimize production income. This research uses the Goal Programming model with the Branch and Bound method. The results of the analysis using the Goal Programming model with the Branch and Bound method obtained an optimal solution, namely excess total completion time (makespan) of 36 minutes, excess average delay time (mean tardines) of 6 minutes, excess raw materials in raw materials. material availability is all zero, and sales revenue shortfall is zero. The results of the sensitivity analysis show that bread production at the Umama Bakery factory will remain optimal if there are changes in the availability of production completion time, delays in production time, and the availability of raw materials during these changes. variables are still within tolerance limits.
OPTIMIZATION OF PRICING AND COST PLANNING USING LINEAR FUNCTIONS: AN ECONOMIC MATHEMATICS PERSPECTIVE ON FINANCIAL STRATEGY AT CAKE MY DAY Hery saputra; Nina Zakiah; Nurina Happy
INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Vol. 2 No. 6 (2025): INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE (INJOLE)
Publisher : Adisam Publisher

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Pricing and cost planning are critical aspects of business management, especially for small enterprises like the "Cakemyday" cake shop. Proper financial planning ensures sustainability and profitability in a competitive market. This study aims to analyze the financial feasibility of "Cakemyday" by calculating the Break-Even Point (BEP) and determining the optimal selling price based on cost structures and demand functions.A quantitative approach was employed, utilizing financial data, including fixed costs, variable costs, and demand function analysis. The BEP calculation determined the minimum number of units required to cover all expenses, while the demand function was derived from historical pricing and sales data to understand consumer behavior.The findings indicate that "Cakemyday" needs to sell 78 units to reach BEP, with a contribution margin of Rp 90,000 per unit. Furthermore, to achieve a profit target of Rp 3,000,000, an optimal selling price of approximately Rp 188,000 per unit was determined. The demand function analysis revealed a negative correlation between price and quantity demanded, supporting strategic pricing decisions.The study concludes that understanding financial metrics and consumer behavior is essential for sustainable business growth. It is recommended that "Cakemyday" implement targeted marketing strategies and monitor pricing dynamics to enhance profitability. Future research may explore external factors affecting demand and conduct comparative studies with similar businesses.
Co-Authors Nina Zakiah Nurina Happy Nurina Happy Sinta Verawati Dewi Sri Rafiqoh Zuhri Zuhri